tscrypter/dotnet_exercise

Dog Daycare

Description

Dog Daycare is a simple example application composed of an MVC application and a WebAPI service. Both apps have their own MySQL database, communicate with each other using Eureka for service registry, and can be monitored using a Spring Boot Admin. All necessary services can be started from the main directory with the following command:

docker-compose up && docker-compose down

Notes

• Scaffolding for MVC does not work on linux
  • dotnet/Scaffolding#1418
  • dotnet/Scaffolding#1393
  • dotnet/Scaffolding#1384
• Ambiguous Steeltoe documentation on connectors
  • https://docs.steeltoe.io/api/v3/connectors/mysql.html "Then add a reference to the appropriate Steeltoe connector NuGet package."
• Setting "Eureka__Client__ServiceUrl=http://eureka:8761" throws the following exception

  System.NullReferenceException: Object reference not set to an instance of an object.
     at Steeltoe.Discovery.Eureka.EurekaInstanceOptions.ApplyConfigUrls(List`1 addresses, String wildcard_hostname)
     at Steeltoe.Discovery.Eureka.EurekaPostConfigurer.UpdateConfiguration(IConfiguration config, EurekaInstanceOptions options, IApplicationInstanceInfo instanceInfo)
     at Steeltoe.Discovery.Eureka.EurekaPostConfigurer.UpdateConfiguration(IConfiguration config, EurekaServiceInfo si, EurekaInstanceOptions instOptions, IApplicationInstanceInfo appInfo)
     at Steeltoe.Discovery.Eureka.EurekaDiscoveryClientExtension.<>c__DisplayClass9_0.<ConfigureEurekaServices>b__1(EurekaInstanceOptions options)
     at Microsoft.Extensions.Options.PostConfigureOptions`1.PostConfigure(String name, TOptions options)
     at Microsoft.Extensions.Options.OptionsFactory`1.Create(String name)
     at Microsoft.Extensions.Options.OptionsMonitor`1.<>c__DisplayClass11_0.<Get>b__0()
     at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
     at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
     at System.Lazy`1.CreateValue()
     at System.Lazy`1.get_Value()
     at Microsoft.Extensions.Options.OptionsCache`1.GetOrAdd(String name, Func`1 createOptions)
     at Microsoft.Extensions.Options.OptionsMonitor`1.Get(String name)
     at Microsoft.Extensions.Options.OptionsMonitor`1.get_CurrentValue()
     at Steeltoe.Discovery.Eureka.EurekaApplicationInfoManager.get_InstanceConfig()
     at Steeltoe.Discovery.Eureka.EurekaApplicationInfoManager..ctor(IOptionsMonitor`1 instConfig, ILoggerFactory logFactory)
  

  If not overriding the ServiceUrl property and running on the host network, the default setting works and the service registers with Eureka
  ✔️ Discovered this is fixed by adding a reference to Steeltoe.Common.Hosting:3.0.1 and UseCloudHosting(port)